<template>
  <div>
      <!--    面包屑区域-->
      <el-breadcrumb  separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>权限管理</el-breadcrumb-item>
        <el-breadcrumb-item>角色列表</el-breadcrumb-item>
      </el-breadcrumb>
<!--    卡片视图-->
    <el-card>
<!--      添加角色按钮区域-->
      <el-row>
        <el-col>
          <el-button type="primary" @click="addRoleVisible = true">添加角色</el-button>
        </el-col>
      </el-row>
<!--      角色列表区域-->
      <el-table :data="roleList" border stripe>
<!--        展开列-->
        <el-table-column type="expand">
          <template v-slot="scope">
            <el-row
                :class="['v-center','bd-bottom',i1 === 0 ? 'bd-top' : '']"
                v-for="(item1,i1) in scope.row.children"
                :key="item1.id">
              <!--渲染一级权限-->
              <el-col :span="5">
                <el-tag>{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!--渲染二级和三级权限-->
              <el-col :span="19">
<!--                  通过for循环嵌套渲染二级权限-->
                <el-row
                    :class="['v-center',i2 === 0 ?  '' : 'bd-top']"
                    v-for="(item2,i2) in item1.children"
                    :key="item2.id">
                  <el-col :span="6">
                    <el-tag type="success">{{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag
                        type="warning"
                        v-for="item3 in item2.children"
                        :key="item3.id"
                        closable
                        @close="removeRightById(scope.row, item3.id)">
                      {{item3.authName}}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
<!--        索引列-->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色操作" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
                <template v-slot="scope">
                  <el-button
                      size="mini"
                      type="primary"
                      icon="el-icon-edit"
                      @click="showEditRole(scope.row.id)">
                      编辑
                  </el-button>
                  <el-button
                      size="mini"
                      type="danger"
                      icon="el-icon-delete"
                      @click="deleteRoles(scope.row.id)">
                      删除
                  </el-button>
                  <el-button
                      size="mini"
                      type="warning"
                      icon="el-icon-setting"
                      @click="showSetRightDialog(scope.row)">
                      分配权限
                  </el-button>
                </template>
        </el-table-column>
      </el-table>

    </el-card>
    <!--    添加角色对话框-->
    <el-dialog
        title="添加角色"
        :visible.sync="addRoleVisible"
        width="50%"
        @close="addClosed">
      <!--      内容主体区域-->
      <el-form
          ref="addRolesRef"
          :rules="addAuthorityRules"
          :model="addRoles"
          label-width="80px">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addRoles.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色操作" prop="roleDesc">
          <el-input v-model="addRoles.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
          <el-button @click="addRoleVisible = false">取 消</el-button>
          <el-button type="primary" @click="addAuthorityRoles">确 定</el-button>
        </span>
    </el-dialog>

    <!--    修改角色的对话框-->
    <el-dialog
        title="修改角色"
        :visible.sync="editRoleVisible"
        width="50%"
        @close="editRoleClosed">
      <el-form
          ref="editRolesRef"
          :model="editRole"
          :rules="addAuthorityRules"
          label-width="80px">
        <el-form-item label="用户名" prop="roleName">
          <el-input v-model="editRole.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色操作" prop="roleDesc">
          <el-input v-model="editRole.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editRoleVisible = false">取 消</el-button>
        <el-button type="primary" @click="editRoleInfo">确 定</el-button>
      </span>
    </el-dialog>

<!--    分配权限对话框-->
    <el-dialog
        title="分配权限"
        :visible.sync="setRightDialogVisible"
        width="50%"
        @close="setRightDialogClosed"
        ref="">
<!--      树形空间-->
      <el-tree
          :data="rightsList"
          :props="treeProps"
          show-checkbox
          node-key="id"
          default-expand-all
          :default-checked-keys="defKeys"
          ref="treeRef">
      </el-tree>
      <span slot="footer" class="dialog-footer">
    <el-button @click="setRightDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="allotRights">确 定</el-button>
  </span>
    </el-dialog>


  </div>
</template>

<script>
  export default {
    name: "Roles",
    data() {
      return {
        //所有角色列表区域
        roleList: [],
        //添加用户的表单数据
        addRoles: {
          roleName: '',
          roleDesc: '',
        },
        //控制添加用户对话框的显示与隐藏
        addRoleVisible: false,
        //添加用户的验证规则对象
        addAuthorityRules: {
          roleName: [{
            required: true,
            message: '请输入角色名称',
            trigger: 'blur',
          },{
            min: 2,
            max: 10,
            message: '长度在 2 到 10 个字符',
            trigger: 'blur',
          }],
          roleDesc: [{
            required: true,
            message: '请输入角色操作',
            trigger: 'blur',
          },{
            min: 2,
            max: 20,
            message: '长度在 2 到 20 个字符',
            trigger: 'blur',
          }]
        },
        //控制修改用户对话框的显示与隐藏
        editRoleVisible: false,
        //查询用户信息的对象
        editRole: {},
        //展示分配权限的对话框
        setRightDialogVisible: false,
        //所有权限的数据
        rightsList: [],
        //树形控件的属性绑定对象
        treeProps: {
          label: 'authName',
          children: 'children'
        },
        //默认选中的节点ID值
        defKeys: [],
        //当前即将分配角色权限的Id
        roleId: [],
      }
    },
    created() {
      this.getRoleList()
    },
    methods: {
       async getRoleList() {
        const {data:res} = await this.$http.get('roles')
        if (res.meta.status !== 200) {
          return this.$message.error('获取角色列表失败')
        }
        this.roleList = res.data
       },
      //点击按钮，添加新角色
      addAuthorityRoles() {
        this.$refs.addRolesRef.validate(async valid => {
          if (!valid) return
          //可以发起添加用户的网络请求
          const{data: res} = await this.$http.post('roles',this.addRoles)
          if (res.meta.status !== 201) {
            return this.$message.error('添加角色失败')
          }
          this.$message.success('添加角色成功')
          //隐藏添加用户的对话框
          this.addRoleVisible = false
          //重新获取用户列表
          this.getRoleList()
        })
      },
      addClosed() {
        this.$refs.addRolesRef.resetFields()
      },
      async showEditRole(id) {
        const {data:res} = await this.$http.get(`roles/${id}`)
        if (res.meta.status !== 200) {
          return this.$message.error('查询用户信息失败')
        }
        this.editRole = res.data
        this.editRoleVisible = true
      },
      //修该用户信息并提交
      editRoleInfo() {
        this.$refs.editRolesRef.validate(async valid => {
          if (!valid) return
          //发起修改用户信息的数据请求
          const {data:res} = await this.$http.put(`roles/${this.editRole.roleId}`,
              {
                roleName: this.editRole.roleName,
                roleDesc: this.editRole.roleDesc
              })
          if (res.meta.status !== 200) {
            return this.$message.error('更新角色信息失败')
          }
          //关闭对话框
          this.editRoleVisible = false
          //刷新数据列表
          this.getRoleList()
          //提示修该成功
          this.$message.success('更新角色信息成功')
        })
      },
      editRoleClosed() {
        this.$refs.editRolesRef.resetFields()
      },
      async deleteRoles(id) {
        //弹窗询问用户是否删除数据
        const confirmResult = await this.$confirm
        ('此操作将永久删除该用户, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err)
        //如果用户确认删除，则返回值为字符串 confirm
        //如果用户取消了删除，则返回值为字符串 cancel
        if (confirmResult !== 'confirm') {
          return this.$message.info('已取消删除')
        }
        const{data:res} = await this.$http.delete(`roles/${id}`)
        if (res.meta.status !== 200) {
          return this.$message.error('删除用户失败！')
        }
        this.$message.success('删除用户成功！')
        this.getRoleList()
      },
      //根据ID删除权限
      async removeRightById(role, rightId) {
          const confirmResult = await this.$confirm('此操作将永久删除该权限, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err)

        if (confirmResult !== 'confirm') {
          return this.$message.info('取消了删除！')
        }
        const {data:res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
        if (res.meta.status !== 200) {
          return this.$message.error('删除权限失败')
        }
        this.$message.success('删除权限成功！')
        role.children = res.data
      },
      //展示分配权限的对话框
      async showSetRightDialog(role) {
         //获取所有权限的数据
        this.roleId = role.id
        const {data:res} = await this.$http.get('rights/tree')
        if (res.meta.status !== 200) {
          return this.$message.error('获取权限失败')
        }
        this.rightsList = res.data
        //递归获取三级节点的Id
        this.getLeafKeys(role,this.defKeys)
        this.setRightDialogVisible = true
      },
      //通过递归函数形式，获取角色下所有的三级权限的id，并保存到defKeys数组中
      getLeafKeys(node, arr) {
         //如果当前node节点不包含children属性，则是三级节点
        if (!node.children) {
          return arr.push(node.id)
        }
        node.children.forEach(item => {
          return this.getLeafKeys(item, arr)
        })
      },
      //监听分配权限
      setRightDialogClosed() {
        this.defKeys = []
      },
      //点击为角色分配权限
      async allotRights() {
        const keys = [...this.$refs.treeRef.getCheckedKeys(),...this.$refs.treeRef.getHalfCheckedKeys()]
        const idStr = keys.join(',')
        const {data:res} = await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})

        if (res.meta.status !== 200) {
          return this.$message.error('分配角色权限失败！')
        }
        this.$message.success('分配角色权限成功')
        //刷新数据
        this.getRoleList()
        //关闭对话框
        this.setRightDialogVisible = false
      }
    }
  }
</script>

<style lang="less" scoped>
  .el-tag{
    margin: 7px;
  }

  .bd-top {
    border-top: 1px solid #eee;
  }

  .bd-bottom {
    border-bottom: 1px solid #eee;
  }

  .v-center {
    display: flex;
    align-items: center;
  }
</style>